文献类型：期刊文献

中文题名：贵州织金新华磷矿区风化磷块岩形成条件及风化淋滤富集机制初步研究

英文题名：A preliminary study on the formation conditions and weathering leaching enrichment mechanism of secondary phosphorite in the Xinhua phosphate mining area,Zhijin,Guizhou

作者：梁坤萍 程国繁 覃庆炎 吴荣 李斌

第一作者：梁坤萍

机构：[1]贵州大学资源与环境工程学院,贵阳550025;[2]贵州理工学院,贵阳550025;[3]贵州省地矿局111地质大队,贵阳550081;[4]黑龙江龙煤地质勘探有限公司物测分公司,黑龙江佳木斯154007

第一机构：贵州大学资源与环境工程学院,贵阳550025

年份：2022

卷号：41

期号：4

起止页码：172-183

中文期刊名：地质科技通报

外文期刊名：Bulletin of Geological Science and Technology

收录：CSTPCD;;北大核心:【北大核心2020】；CSCD:【CSCD_E2021_2022】；

基金：贵州省地质资源与地质工程人才基地项目(黔人领发[2018]3号);地质资源与地质工程贵州省重点学科建设计划(ZSXK[2018]001);贵州省岩溶工程地质与隐伏矿产资源特色重点实验室项目(黔教科研发[2018]205号);教育部首批全国高校黄大年式教师团队项目(教师函[2018]1号);贵州理工学院构造地质学重点课程建设项目(ZDKC201605);贵州理工学院“构造地质学”校级一流课程建设项目(2019);贵州理工学院高层次人才引进科研启动项目(地面TEM数据地形校正及电磁干扰压制技术研究(0203001018054))。

语种：中文

中文关键词：风化磷块岩;矿床特征;形成条件;富集机制;贵州;织金

外文关键词：weathering phosphorite ore;deposit feature;formation condition;enrichment mechanism;Zhijin County,Guizhou Province

摘要：贵州织金新华磷矿是我国西南地区著名的超大型含稀土低品位磷矿床,矿床平均品位w(P_(2)O_(5))为17.22%,已探明磷矿石储量13.48亿t,稀土资源量350万t。近年研究发现,新华磷矿矿石品位的波动变化与风化淋滤富集作用关系密切。为了进一步阐明风化淋滤作用对磷矿元素地球化学的影响及磷矿的次生富集规律,以戈仲伍矿段为重点研究对象,对含磷岩系开展了野外观察描述,应用连续敲块法采集化学分析样品19件,运用光学显微镜进行岩矿鉴定样品16件,并对样品进行了岩石成分鉴定及综合研究工作。研究结果表明,风化磷矿中w(P_(2)O_(5))比原生磷矿提高了8%~18%,w(MgO)比原生磷矿降低了4%~7%,风化强度处于弱到成熟阶段。织金新华风化磷矿的形成受到岩性条件、地质构造、水文条件等因素控制。本研究可以为深入研究该矿床的次生风化成矿作用对磷矿石化学成分的影响及为新的矿产研究提供资料,为丰富我国风化淋积型磷矿床的成矿理论提供新认识,为该矿区风化磷矿资源的合理开发利用提供理论指导。
The Xinhua phosphate mining are alocated in Zhijin County,Guizhou Province,is a famous superlarge low-grade phosphate deposit containing rare earth elements in the southwest of China.The average P_(2)O_(5) grade of the deposit is 17.22%.The proven phosphorite ore resources are 1.348 billion tons,and the rare earth resources are 3500 kilotons.In recent years,experts and scholars have found that the fluctuation of Xinhua phosphorite ore grade is closely related to weathering,leaching and enrichment effects.To further clarify the influence of weathering and leaching on the element geochemistry as well as the secondary enrichment of phosphate rock,the author focuses on the Gezhongwu ore block and carries out field observations and descriptions of phosphate rock series.A total of 19 chemical analysis samples were collected using block knocking method and 16 rock ore samples were identified through polarizing microscope.On these basis,identification and comprehensive research on the samples were conducted.The results show that the contents of P_(2)O_(5) in the weathered phosphate rock are 8%-18%,higher than that in the primary phosphate rock,while the contents of MgO are 4%-7%,lower than that in the primary phosphate rock.The weathering intensity of phosphate rock is in the weak to mature stage.The formation of Xinhua weathered phosphate rock in Zhijin County is controlled by lithology,geological structure and hydrological conditions.The purpose of this paper is to provide new information for the further study of the influences of the secondary weathering mineralization of the ore deposit on the chemical composition of phosphate rock,to enrich the metallogenic theories of weathering eluvial phosphate mining in China and to provide the oretical guidance for the rational development and utilization of weathering phosphate resources in the mining area.